<p>Learn how check digits are used to verify everything from the numbers on your credit cards to the UPC codes on the products you buy.</p>

Learn how check digits are used to verify everything from the numbers on your credit cards to the UPC codes on the products you buy.

085 TMD How Are Check Digits Used in the Real World?

The Math Dude makes understanding math easier and more fun than you ever thought possible. Host Dr. Jason Marshall provides clear explanations of math terms and principles, and his simple tricks for solving basic algebra problems will have even the most mathphobic looking forward to working out whatever math problem comes their way. If you're getting ready to take the SAT, GRE, or any of the other standardized tests; or if you're going back to school and need to brush up on the basics, Math Dude's Quick and Dirty Tips to Make Math Easier will strengthen your fundamental skills and help you understand the language of math. And if you just want to calculate the tip without using your iPhone and impress all your friends, his tips and tricks are for you too.

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085 TMD How Are Check Digits Used in the Real World?

085 TMD How Are Check Digits Used in the Real World?

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